CN107445196A - A kind of stratiform Sn3O4/SnO2The preparation method of hetero-junctions square piece type gas sensitive - Google Patents
A kind of stratiform Sn3O4/SnO2The preparation method of hetero-junctions square piece type gas sensitive Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 36
- XOLBLPGZBRYERU-UHFFFAOYSA-N SnO2 Inorganic materials O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 35
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 18
- 239000012498 ultrapure water Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 7
- 238000005245 sintering Methods 0.000 claims abstract description 7
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910021626 Tin(II) chloride Inorganic materials 0.000 claims abstract description 5
- AXZWODMDQAVCJE-UHFFFAOYSA-L tin(II) chloride (anhydrous) Chemical compound [Cl-].[Cl-].[Sn+2] AXZWODMDQAVCJE-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims abstract description 3
- 230000000877 morphologic effect Effects 0.000 claims abstract description 3
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 229960004889 salicylic acid Drugs 0.000 claims abstract description 3
- 239000002904 solvent Substances 0.000 claims abstract description 3
- 235000019441 ethanol Nutrition 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- MFYSUUPKMDJYPF-UHFFFAOYSA-N 2-[(4-methyl-2-nitrophenyl)diazenyl]-3-oxo-n-phenylbutanamide Chemical compound C=1C=CC=CC=1NC(=O)C(C(=O)C)N=NC1=CC=C(C)C=C1[N+]([O-])=O MFYSUUPKMDJYPF-UHFFFAOYSA-N 0.000 claims description 5
- 239000012043 crude product Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 5
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 150000003870 salicylic acids Chemical class 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims 1
- 238000007146 photocatalysis Methods 0.000 abstract description 4
- 230000001699 photocatalysis Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 38
- 238000001228 spectrum Methods 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 235000011837 pasties Nutrition 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 238000010189 synthetic method Methods 0.000 description 2
- 239000010405 anode material Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- LWJYMKDMGMOTSB-UHFFFAOYSA-L dichlorotin;hydrate Chemical compound O.Cl[Sn]Cl LWJYMKDMGMOTSB-UHFFFAOYSA-L 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G19/00—Compounds of tin
- C01G19/02—Oxides
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
- C01P2004/22—Particle morphology extending in two dimensions, e.g. plate-like with a polygonal circumferential shape
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The invention discloses a kind of stratiform Sn3O4/SnO2The preparation method of hetero-junctions square piece type gas sensitive.The preparation method is with SnCl2▪2H2O and NaOH is primary raw material, and using salicylic acid as Morphological control agent, using ethanol and high purity water as solvent, stratiform Sn is prepared using hydrothermal synthesis method3O4Square plate-shaped material, then by controlling sintering condition to prepare stratiform Sn3O4/ SnO2Hetero-junctions square piece type gas sensitive.Compared with the prior art, present invention side is simple into method, and reaction condition is gentle, and production cost is low, and specific surface area is big, has potential use in terms of gas sensor, battery, catalyst and photocatalysis.
Description
Technical field
The invention belongs to gas-sensitive nano material preparation field, and in particular to a kind of stratiform Sn3O4/ SnO2Hetero-junctions square piece type
The preparation method of gas sensitive.
Background technology
The oxide of tin has many kinds, wherein monovalent oxide only has the SnO of divalent state and the SnO of four valence states2, mixed valence
The oxide of the tin of state has a lot, and that we mainly use is Sn3O4.SnO is a kind of typical p-type semiconductor material, can bandwidth
Spend for 2.7-3.2eV, be widely used in gas sensor and anode material for lithium-ion batteries.SnO2As a kind of broad stopband
（3.6eV）N-type semiconductor oxide, have heat resistance, it is resistance to candle property, the cost of material is low and has good response to multiple gases
The advantages that, it is the most frequently used gas sensitive, common crystal is rutile structure, has tetragonal crystal system symmetry.Sn3O4It is one
The oxide of the mixed valence of kind tin, existing positive 4 valency of tin element have positive divalent, Sn again3O4It is a kind of n-type semiconductor, can band
Width compares SnO2Narrow is 2.76eV, has good photoelectricity, photocatalysis and gas-sensitive property, in lithium ion battery, sensor, photoelectricity
There is good application in terms of catalysis.
Sn3O4Now it is mainly used in light-catalyzed reaction, at present Sn3O4Synthetic method is mainly hydro-thermal method, and other also have carbon reduction
Method etc..The pattern of synthesis is also varied, there is a graininess, flower-shaped, plate-like, sheet, hollow ball etc., but stratiform Sn3O4Material
Material synthesis is also fewer at present, only Sungkyunkwan University Kale, BB and the Adhyapak of document report,
The graininess Sn that PV is synthesized with hydrothermal method3O4Material, the material are observed under the tem, are layer structure, and document mainly have studied
The photocatalysis of this kind of material, and the application in reduction-sulfurization hydrogen hydrogen, but stratiform Sn prepared by this method3O4Material
Preparation method for material is complicated, and is large grained, and dispersiveness is bad.Sao Paulo State Univ UNESP Suman, PH
The method of reduction with carbon is prepared for banding Sn3O4Material, the material are stratiform, mainly reduce SnO by carbon2Prepare Sn3O4Material,
The document is investigated the Sn3O4Material responds to the air-sensitive of oxygen, stratiform Sn prepared by this method3O4Material, in preparation process
Energy consumption is more, and its sensor temperature prepared is 300 DEG C, and many energy can be also consumed in the case of long-term work, are unfavorable for
Energy-saving and emission-reduction.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of stratiform Sn3O4/ SnO2Hetero-junctions square piece type
The preparation method of gas sensitive, this method synthesis condition is gentle, and energy consumption is low, and simple liquid phase synthesis techniques obtain square piece shape air-sensitive
Material homogeneity is good, and specific surface area is big, and air-sensitive performance is good, and manufacturing process repeatability is strong.
To solve prior art problem, the technical scheme that the present invention takes is：
A kind of stratiform Sn3O4/ SnO2The preparation method of hetero-junctions square piece type gas sensitive, with SnCl2▪2H2O and NaOH is main
Raw material, using salicylic acid as Morphological control agent, using ethanol and high purity water as solvent, stratiform Sn is prepared using hydrothermal synthesis method3O4Square piece
Section bar material, then by controlling sintering condition to prepare stratiform Sn3O4/ SnO2Hetero-junctions square piece type gas sensitive.
It is that the above method specifically includes following steps as improved：Step 1, after high purity water and ethanol being mixed, add
0.1-0.7g salicylic acids are stirred to being completely dissolved, and adding 1-15mlNaOH solution, to obtain the first mixed liquor standby；Step 2, will
0.17-0.85g SnCl2·H2O, which is dissolved in 10-30ml high purity waters, obtains tin chloride solution；Step 3, tin chloride solution is instilled
In first mixed liquor, after stirring 20-60min, it is transferred in polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, reacts 4-24h at 120-240 DEG C
Afterwards, light-yellow precipitate is cooled down to obtain；Step 4, by light-yellow precipitate successively with high purity water and absolute ethyl alcohol 6000-10000rpm's
Under rotating speed centrifuge washing 2-8 times crude product；Step 5, by crude product, dry 2-8 hours obtain stratiform Sn at 40-80 DEG C3O4Square piece type
Material；Step 6, by Sn3O4Square plate-shaped material is placed in tube furnace, at 400-600 DEG C sinter 1-4 hours produce stratiform Sn3O4/
SnO2Hetero-junctions square piece type gas sensitive.
It is that the resistance value of high purity water is 18.2M Ω in step 1 and step 2 as improved.
It is that the rotating speed of centrifuge washing is 8000rpm in step 4 as improved.
It is that the concentration of NaOH solution is 1mol/L in step 1 as improved, the volume ratio of the high purity water and ethanol is
1:1。
It is that drying temperature is 60 DEG C in step 5, a length of 6 hours when drying as improved.
It is that the sintering temperature of tube furnace is 500 DEG C, sintering time 2h in step 6 as improved, heating and cooling speed
Rate is 5 DEG C/min.
Beneficial effect
Compared with the prior art, synthetic method is simple, and reaction condition is gentle, and production cost is low, and specific surface area is by the present invention
25.65m2/ g, for sensor prepared by the material in 240 DEG C of test temperature, the air-sensitive response to ethanol is 146, and is had very well
Air-sensitive selectivity.The material has potential use in terms of gas sensor, battery, catalyst and photocatalysis.
Brief description of the drawings
Fig. 1 is stratiform Sn prepared by the embodiment of the present invention 13O4Square plate-shaped material XRD spectrum；
Fig. 2 is stratiform Sn prepared by the embodiment of the present invention 13O4Square plate-shaped material SEM spectrum；
Fig. 3 is stratiform Sn prepared by the embodiment of the present invention 13O4/ SnO2Hetero-junctions square piece type gas sensitive XRD spectrum；
Fig. 4 is stratiform Sn prepared by the embodiment of the present invention 13O4/ SnO2Hetero-junctions square piece type gas sensitive SEM spectrum；
Fig. 5 is stratiform Sn prepared by the embodiment of the present invention 13O4/ SnO2Hetero-junctions square piece type gas sensitive TEM collection of illustrative plates；
Fig. 6 is that gas sensor prepared by the embodiment of the present invention 2 tests 100ppm alcohol gas when operating temperature is 240 DEG C
Sensitivity and the graph of a relation of heating voltage；
Fig. 7 is the sensitivity of gas sensor prepared by embodiment 2 with the graph of a relation of gas concentration.
Embodiment
Embodiment 1
A kind of stratiform Sn3O4/ SnO2The preparation method of hetero-junctions square piece type gas sensitive, comprises the following steps：
Step 1, after high purity water and ethanol being mixed, 0.276g salicylic acids is added and are stirred to being completely dissolved, it is molten to add 7mlNaOH
It is standby that liquid obtains the first mixed liquor；
Step 2, by 0.339g SnCl2 H2O, which is dissolved in 10ml high purity waters, obtains tin chloride solution；
Step 3, tin chloride solution is instilled in the first mixed liquor, after stirring 30 minutes, it is anti-is transferred to 40ml polytetrafluoroethylene (PTFE) hydro-thermals
Answer in kettle, after being reacted 16 hours at 150 DEG C, cool down to obtain light-yellow precipitate；
Step 4, by light-yellow precipitate successively with high purity water and absolute ethyl alcohol under 8000rpm rotating speed centrifuge washing 6 times slightly
Product；
Step 5, crude product is dried into 4 hours to obtain stratiform Sn at 60 DEG C3O4Square plate-shaped material；
Step 6, by Sn3O4Square plate-shaped material is placed in tube furnace, is sintered 2 hours at 500 DEG C and is produced stratiform Sn3O4/ SnO2It is different
Matter knot square piece type gas sensitive.
Wherein, the resistance value of high purity water is 18.2 M Ω in step 1 and step 2；The concentration of NaOH solution is 1mol/L, institute
The volume ratio for stating high purity water and ethanol is 1:1.
To step 5 gained stratiform Sn3O4Square plate-shaped material is characterized, as a result as depicted in figs. 1 and 2, respectively stratiform
Sn3O4Square plate-shaped material carries out XRD spectrum, stratiform Sn3O4Square plate-shaped material carries out SEM spectrum.
The stratiform Sn prepared to step 63O4/ SnO2Hetero-junctions square piece type gas sensitive is characterized, as a result such as Fig. 3-5 institutes
Show, wherein, Fig. 3 is stratiform Sn3O4/ SnO2Hetero-junctions square piece type gas sensitive carries out XRD spectrum；Fig. 4 is stratiform Sn3O4/SnO2
Hetero-junctions square piece type gas sensitive carries out SEM spectrum；Fig. 5 is stratiform Sn3O4/SnO2Hetero-junctions square piece type gas sensitive carries out TEM
Collection of illustrative plates.
Embodiment 2
The stratiform Sn prepared with embodiment 13O4/ SnO2Hetero-junctions square piece type gas sensitive and high purity water are mixed into pasty state, and apply
Cloth after drying, is placed in tube furnace on alchlor/Au electrodes, and 2 hours are sintered at 500 DEG C finally by the electricity of preparation
Pole is welded on electrodes base, is obtained based on stratiform Sn3O4/ SnO2The ethanol gas sensor of hetero-junctions side's plate-shaped material.
Comparative example 1
The stratiform Sn prepared with embodiment 13O4Square plate-shaped material is placed in tube furnace, is sintered 2 hours at 700 DEG C and is produced SnO2Side
Piece type gas sensitive, then pasty state is blended together with high purity water, and be coated on alchlor/Au electrodes, after drying, it is placed in tube furnace
In, 2 hours are sintered at 500 DEG C respectively finally by the electrode welding of preparation on electrodes base, is obtained based on SnO2Square piece section bar
The ethanol gas sensor of material.
Performance test is carried out to the gas sensor of embodiment 2 and comparative example 1.Fig. 6 tests for its optimum working temperature, surveys
Gas testing body is 100ppm alcohol gas, Sn3O4/ SnO2The optimum working temperature of hetero-junctions square piece material gas sensor is 240
DEG C (heating voltage 4v), sensitivity 146；SnO2The optimum working temperature of square piece material gas sensor is 240 DEG C of (heating
Voltage is 4v), sensitivity 12.5.Fig. 7 be the sensitivity of above two gas sensor air-sensitive with gas concentration variation diagram,
It can be seen that stratiform Sn3O4/ SnO2Gas sensor sensitivity prepared by hetero-junctions square piece type gas sensitive is higher.
Claims (7)
- A kind of 1. stratiform Sn3O4/ SnO2The preparation method of hetero-junctions square piece type gas sensitive, it is characterised in that with SnCl2▪2H2O It is primary raw material with NaOH, using salicylic acid as Morphological control agent, using ethanol and high purity water as solvent, is prepared using hydrothermal synthesis method Stratiform Sn3O4Square plate-shaped material, then by controlling sintering condition to prepare stratiform Sn3O4/ SnO2Hetero-junctions square piece type gas sensitive.
- A kind of 2. stratiform Sn described in as requested 13O4/ SnO2The preparation method of hetero-junctions square piece type gas sensitive, its feature It is, comprises the following steps：Step 1, after high purity water and ethanol being mixed, 0.1-0.7g salicylic acids is added and are stirred to completely molten Solution, adding 1-15mlNaOH solution, to obtain the first mixed liquor standby；Step 2, by 0.17-0.85g SnCl2·H2O is dissolved in 10- Tin chloride solution is obtained in 30ml high purity waters；Step 3, tin chloride solution is instilled in the first mixed liquor, after stirring 20-60min, turned Enter in polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, after reacting 4-24h at 120-240 DEG C, cool down to obtain light-yellow precipitate；Step 4, will be pale yellow With high purity water and absolute ethyl alcohol, centrifuge washing obtains crude product 2-8 time to color precipitation under 6000-10000rpm rotating speed successively；Step 5, By crude product, dry 2-8 hours obtain stratiform Sn at 40-80 DEG C3O4Square plate-shaped material；Step 6, by Sn3O4Square plate-shaped material is placed in In tube furnace, at 400-600 DEG C sinter 1-4 hours produce stratiform Sn3O4/ SnO2Hetero-junctions square piece type gas sensitive.
- A kind of 3. stratiform Sn according to claim 23O4/SnO2The preparation method of hetero-junctions square piece type gas sensitive, it is special Sign is that the resistance value of high purity water is 18.2 M Ω in step 1 and step 2.
- A kind of 4. stratiform Sn according to claim 23O4/SnO2The preparation method of hetero-junctions square piece type gas sensitive, it is special Sign is that the rotating speed of centrifuge washing is 8000rpm in step 4.
- A kind of 5. stratiform Sn according to claim 23O4/SnO2The preparation method of hetero-junctions square piece type gas sensitive, it is special Sign is that the concentration of NaOH solution is 1mol/L in step 1, and the volume ratio of the high purity water and ethanol is 1:1.
- A kind of 6. stratiform Sn according to claim 23O4/SnO2The preparation method of hetero-junctions square piece type gas sensitive, it is special Sign is that drying temperature is 60 DEG C in step 5, a length of 4 hours when drying.
- A kind of 7. stratiform Sn according to claim 23O4/SnO2The preparation method of hetero-junctions square piece type gas sensitive, it is special Sign is that the sintering temperature of tube furnace is 500 DEG C, sintering time 2h in step 6, and heating and rate of temperature fall are 5 DEG C/min.
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Cited By (5)
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| CN108341426A (en) * | 2018-05-18 | 2018-07-31 | 南京工业大学 | A kind of preparation and application of acetone sensing material |
| CN109360952A (en) * | 2018-09-25 | 2019-02-19 | 陕西科技大学 | A kind of preparation method of nanometer sheet structure tin oxide/tetra- three tin lithium ion battery negative materials of oxidation |
| CN109655499A (en) * | 2019-01-23 | 2019-04-19 | 中物院成都科学技术发展中心 | A kind of gas sensitive and preparation method thereof for nitrogen dioxide sensor |
| CN110739221A (en) * | 2019-10-23 | 2020-01-31 | 昆明物理研究所 | Preparation method of tin oxide film with adjustable band gap |
| CN110987260A (en) * | 2018-03-20 | 2020-04-10 | 武汉铂纳智感科技有限公司 | Flexible electronic skin capable of sensing pressure and air sensitivity simultaneously and preparation method thereof |
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| CN103877966A (en) * | 2014-04-09 | 2014-06-25 | 扬州大学 | Preparation method of heterostructure photocatalyst |
| CN105036068A (en) * | 2015-06-17 | 2015-11-11 | 山东大学 | Composite material suitable for low-temperature ethanol sensor and application of composite material |
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| CN109655499B (en) * | 2019-01-23 | 2021-06-15 | 中物院成都科学技术发展中心 | Gas-sensitive material for nitrogen dioxide sensor and preparation method thereof |
| CN110739221A (en) * | 2019-10-23 | 2020-01-31 | 昆明物理研究所 | Preparation method of tin oxide film with adjustable band gap |
| CN110739221B (en) * | 2019-10-23 | 2022-07-05 | 昆明物理研究所 | Preparation method of tin oxide film with adjustable band gap |
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